docs: def pitch(self, shift,
                use_tree=False,
                segment=82,
                search=14.68,
                overlap=12):
          """pitch takes 4 parameters: user_tree (True or False), segment, search
          and overlap."""
          self.command.append("pitch")
          if use_tree:
              self.command.append('-q')
          self.command.append(shift)
          self.command.append(segment)
          self.command.append(search)
          self.command.append(overlap)
          return self